Yokogawa - Model TDLS8220 -Extractive Tunable Diode Laser Spectrometer

• Analyzer, flow cell, heat trace control, insulation, purge control, and wiring termination pre-integrated
• Drop-in replacement for existing analyzer technologies
• Integrated tube-in-shell flow cell allows for tight sample heating control
• Pressure and temperature compensation included
• Advanced diagnostics with 50 days of data and spectra storage

Measurement object: O₂
Measurement system: Tunable diode laser spectroscopy

Measured components and range: O₂

Min. range: 0-1%
Max. range: 0-25%

Output signal (Analog Output):

• 2 points, 4 to 20 mA DC
• Output types; Gas concentration, Transmission, Process gas temperature, Process gas pressure
• Output range; 3.0 to 21.6 mA DC

Digital communication: HART, Ethernet, Modbus/TCP

Contact outputs (Digital Output):

• 2 points, contact rating 24 V DC, 1 A
• DO; Function: Activate during Warning / Calibration / Validation / Warm up / Maintenance conditions
• Fault; Function: Activate during normal condition, not activate during fault condition or when the system power is off

Valve control output:

• 2 points
• Function; Activate calibration or validation solenoid valves for zero, span or validation gas
• Output signal; 24 V DC, 500 mA Max. per terminal

Alarm:

• Warning;
  Gas concentration low/high, Transmission low, Process pressure low/high, Process temperature low/high, Validation required, Validation failure, Zero/Span calibration error, Non process alarm, External alarm
• Fault;
  Laser module temperature low/high, Laser temperature low/high, Detector signal high, Peak center out of range, Reference peak height low, Absorption too high, Transmission lost, Reference transmission low, Reference peak height high, Laser unit failure, Laser module error, File access error, E2PROM access error.

Contact inputs (Digital input):

• 2 points
• Function;
• External alarm/Calibration start/Validation start/Stream switch
• Contact specification;
• Zero voltage contact input
• Input signal; Open signal;
• 100 kΩ or more, Close signal; 200 Ω or less

Input signal (Analog input):

• 2 points, 4 to 24 mA DC
• Input types; Process gas pressure, Process gas temperature

Self-diagnostics: Laser Unit temperature, Sensor Control Unit temperature, Laser temperature, Detector signal level, Memory read/write function, Peak locking condition

Calibration

• Calibration method; Zero/Span calibration
• Calibration mode; Manual, Auto, Local initiate (HMI)

Validation:

• Validation method; Up to 2 points
• Validation mode; Manual, Auto, Local initiate (HMI)

Warm-up time: 5 min.

Protection degree: IP65

Hazardous area classifications: The analyzer is designed for operation in hazardous area for gaseous release. Class 1 Division 2 Groups A, B, C, D with purge system. 

Sample gas condition:

• Sample gas temperature: Max 120°C
• Sample gas pressure: 90 to 500 kPa absolute

Installation condition:

• Ambient operating temperature: -20 to +55°C
• Humidity: 0 to 95%RH at 40°C (non-condensing)